Make her come several times during intercourse... Makes her happy... how do i know? She tells me.
I know its off topic, but here we go. (just my thoughts on Sex, whos not interested can stop reading here):
Every Women is different, so you need time to communicate with her, find out what she likes, and so forth.
There are women with clitoral orgasms, some with vaginal orgasms and even a few who can have both. The first few times we had sex (my current girlfriend) i bombarded her with questions. We even talked about it when we were not having sex, just a discussion about it. A good Sex life depends on communication. There are no tabus, you can talk about anything, just as like you can say no to anything.
Some women may have a hard time to have an orgasm. 90% of the time its psychological. Some expiriences they had in the past, or just social cliches.
Women tend to think to much during sex... that distracts them and they cant come.
So, everytime you will have to do your best to drive them almost crazy. Foreplay is essential. Tease them alot, make them think ONLY about sex. You have to banish every other thought from their mind. If you have them in that stadium its no problem to make them orgasm. At least thats my experience.
How do you do that? Well, most women like oral. If you have a agile tounge your good to go
Hope this awnsers your question